#include <stdio.h>

#define MULT(a,b) ((a)*(b))

int main(){
	int i = 10,j=20;
	printf("a和b的乘积为%d\n",MULT(i,j));
	printf("a和b的乘积为%d\n",MULT(i+4,j+4));
	printf("a和b的乘积为%d\n",99030/MULT(i+1,j+2));
}
